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प्रश्न
Write down four general characters of cnidarians (coelenterates). Give two examples.
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उत्तर
General characteristics of cnidarians (coelentrates):
(i) These are aquatic animals and mostly marine, but some are fresh water animals as well.
(ii) These are multicellular, diploblastic animals with tissue level of organisation.
(iii) There body is radially symmetrical.
(iv) They lack respiratory, circulatory and excretory organs.
Examples: Hydra and Tubipora (organ pipe coral)
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